Form for concrete structures



Oct. 14, 1941. A. G. w. WEDBERG FORM FOR CONCRETE STRUCTURES 4 Sheets-Sheet 2 Filed March 3, 1939 4 Sheets-Sheet 3 Filed March 3, 1939 INVENTO Oct. 14, 1941. A. e. w. WEDBERG 2,258,694

FORM'FOR CONCRETE STRUCTURES Filed March 3, 1939 4 Sheets-Sheet 4 G8 W'I'IIIII INVENTOR.

Patented Oct. 14, 1941 res QFFICE are-r FORM FOR CONCRETE STRUCTURES Axel G. W. Wedberg, Chicago, Ill.

Application March 3, 1939, Serial No. 259,552 In Sweden February 25, 1938 or. 25 1s1) Claims.

My invention relates to improvements in concrete structures by which one story at a time including exterior walls and ceiling slabs are cast in a single pour. This invention is an improvement upon my United States Patent No. 1,780,661, issued November 4, 1930; and application for pat ent has been made for this invention by me in Sweden, bearing Number'1117/38.

I provide an improved molding apparatus including a top and bottom liner, horizontal wall forms connecting the top ends of panels on a lower story to the bottom ends of panels on the next story above, wall and ceiling panels, trusses for stiffening wall panels, beam forms and corner connections.

The mold includes liners at floor and ceiling adapted to be associated with the wall panels, so constructed that liners, ends of panels and wall trusses are held together in such manner as to maintain the ends of panels in proper alignment at floor and ceiling.

The contact surfaces between ends of wall trusses and liner being on such an incline that the liners will not pull away from the top end of the wall trusses. Further objects and advantages of my invention will more fully appear from the following detailed description taken in connection with the accompanying drawings which illustrate several embodiments thereof, and in which:

Fig. 1 is a rear elevation of a wall or ceiling panel.

Fig. 2 is a vertical section taken on the line 22 of Fig. 1, looking in the direction indicated by the arrows.

Fig. 3 is an enlarged sectional View taken on the line 33 of Fig. 1.

Fig. 4 is a side elevation showing one half of a wall truss used for bracing the wall panels.

Fig. 5 is an enlarged end-view of the wall truss shown in Fig. 4.

Fig. 6 is a vertical sectional view taken through the concrete form on line 6-6 on Fig. 7, showing the forms for only one side of a wall and part of the ceiling forms.

Fig. 7'is a horizontal sectional view of two adjoining wall panels, taken on the line 1-1 of Fig. 6, looking in the direction indicated by the arrows.

Fig. 8 is a horizontal sectional view of two wall panels adjoining at a corner of a room.

Fig. 9 is a vertical sectional view taken on the line 9-9 of Fig. 10 showing how the top ends of wall panels on one floor are connected to the bottom end of wall panels on the floor above.

Fig. 10 is an elevation of a horizontal wall panel connecting panels from one story to another.

Fig. 11 is a vertical sectional view taken on the line H-H of Fig. 12 showing forms for a concrete beam.

Fig. 12 is a longitudinal vertical sectional view taken on the line |2'l2 of Fig. 11.

Referring now to the drawings in detail, like reference numerals designate similar parts throughout the several views. Now first, I shall describe in detail the wall and ceiling panels. The panel I as shown in Figs. 1, 2 and 3 comprises a sheet metal front 2 backed with ply-wood 3 which serves to stiffen and prevent the sheet 2 from being marred or kinked. The ply-wood 3 in turn is held tight against the sheet 2 by a. plurality of wooden cleats 4. The ends of cleats 4 are shaped to conform with the sides of the metal panel 2, with portions 5 of the cleats held in the pocket formed in the sides of the sheet metal panel and the end 01' the cleats extend rearwardly at 6 to support and reinforce the lateral extension 1 of the sheet metal. The ply-wood 3 is further reinforced by wood cleats 8 which are placed in a perpendicular position between the cleats 4 which also serve to stretch the panel longitudinally and reinforce the cleats l. Referring now to Fig. 6 the mold is shown on one side of a wall for an inside wall, or for the mold on the inside of an exterior wall, and Fig. 9 a vertical section partly broken away, also showing the molds for the outside of an exterior wall. It will be observed that a panel for molding a wall is adapted to rest upon the inclined edge I! on the liner. The top liner I!) and bottom liner H shown in Fig. 6 comprise a plurality of interchangeable units. Each liner consists of three members ll l2 and i3 substantially fastened together as one unit. t intervals of about eighteen inches on centers the members l l and i2 are securely fastened together with a block connection, leaving long openings 14 therebetween. The shoe member 13 has an inclined front surface 15, to correspond with or complementary to the surface l6 on the end of the wall truss 20.

The top surfaces H and I8 of the liner are on an incline to facilitate removal of the forms after the concrete has been poured and set. That is to say, the bottom liners are first removed before the wall panels are removed. The slots I4 between members II and I2 permit the tie rods 59 to be placed at different location between each tie rod l9 in order to prevent the concrete from running through the slots M.

In Fig. '7 I have shown how the wall panels, wall trusses and liners are connected, forming a vertical joint composed of two adjoining wall panels. The panels and truss are connected together by a U-band 22 having its ends formed into hook portions 23 and 24 adapted to engage with the hook portions 25 and 26 on edges of the wall panels I and a wedge 21 placed inside on the U band and driven down over the rear edge 28 of the liner forces the panels and wall truss together tight against th front face of the shoe I3 on the liner, aligning the faces of wall panels with the front face of the liner. The top ends of the panels and liners are'connected in the same manner as at the bottom liners. The pressure from the weight of the wet concret exerted on the tie rods l9 that pass through the top liner 10 will tend to raise the liner in the direction indicated by the arrow 29. This upward movement of the liner will be prevented by the inclined contact surface IS on the wall truss and inclined front face orsurface l5 on the shoe of the liner.

The ceiling panels being of the same type as the wall panels are connected to the wall mold by a cornice member 30 having an offset 31 for th edge of the ceiling panels to rest on. In

Fig. 9 is shown a modified method of connecting the inside wall mold with the ceiling panels by only nailing a board 32 to the face of the liner 33 for the ceiling panel I to rest upon. Now referring again to Fig. 9 I have illustrated somewhat fragmentarily wall forms set in position upon a previously molded story in which 34 represents an exterior wall and 35 a ceiling slab. It is an advantage to be able to use the same height wall panels and trusses for various heights of ceilings. zontal wall panels will vary according to the height of th ceiling.

The horizontal. wall panel 4.6 having two side edges If) and II" which are of the same construction as the liners Ill and II shown in Fig. 6 b

with the exception of the front edge being cut out in Fig. 9 as at 36 and 31 to receive the wood cleats 38 and ply-wood 39. The face 39 may be of ply-wood, or other kind of boards which is reinforced by the cross cleats 38. The rear edges of the sides Ill and II" are tied together by cross cleats 4|.

Where two stories are of unequal height, the upper story being the higher, and it is desired to use the same height panels the liner l I, Fig. 9,

is raised by placing blocks 80 on the floor line to support said liners and forms above. Plywood 8| is nailed against the face of liner II to close the spaces between the liner and the floor. In Fig. 8 I have illustrated how two wall panels I may be connected at the corner of a room by means of a wood piece 42 having a metal strip 43 extending between the edges of the panels so that the two faces of the wood strip will be held in alignment with the face of the metal panels 2.

In Figs. 11 and 12 I have illustrated a metal form to mold concrete beams, which occurs in ceiling slabs. It comprises two beam sides and 5| made in metal having the top edge with the metal double upon itself at 52 and then bent outward to form a support 53 for the lower edge Therefore the width W on the horiof the ceiling panels I to rest on. The bottom edge of the beam side is also bent and doubled up and then bent on an angle to form a flange 54. The beam sides are held in position between spreader 55 and cross piece 56 by tightening the nut 51 on the bolt 53 passing through the spreader 55 and the cross piece 56. The ends 59 and 60 of the beam sides extend to a wall or column on which the ends are supported (not shown) while the adjoining ends 61 and 62 rest upon a board 63 which is supported by a T shore 64 extending to the floor, and the flanges 54 of the beam sides are held between spreader 65 and the'board by tightening the nut 65 on the bolt 61. This permits the nds BI and 62 of the sides to be slid further apart or closer together to take care of various lengths of beams.

The space between the ends GI and 62 is filled with ply-wood or other composition board 10. The bottom of the concrete beam is formed with the sawfit board 63 which may be blocked up from the spreader to correspond to the required depth of beam. With this construction beams of different widths, depths and lengths can be obtained with the same beam sides.

Now from the foregoing it will be obvious that I have provided a readily demountable molding construction for molding an entire story of a building at one time. My invention, however, is not to be limited by the detail disclosure that I have made, but only insofar as defined by the claims attached hereto.

I claim:

1. In forms for concrete structures, a liner including a shoe having an inclined face, and a truss having an inclined end surfac complementary to and engaging said shoe face.

2. In forms for concrete structures, a liner having a recess in its top face front portion and an inclined rear top portion, a panel having a portion formed complementary to said recess and received therein, and a truss formed with an end face complementary to and received uponsaid inclined rear top liner portion.

3. In forms for concrete structures, .a liner, two panels adjoining each other received upon said liner, a truss received upon said liner and disposed between the lateral edges of said panels, a U-clip passing about said truss and engaging the rear edges of said panels, and a wedge passing through said U-clip against said truss and against the rear face of said liner.

4. In forms for concrete structures, panels having rear portions consisting of cleats and plywood, a sheet metal front, said plywood being disposed between said front and cleats, sides integral with said front and each including an extension, the extensions of the sides of two panels cooperating to form a pocket to receive a truss, the ends of said cleats extending rearwardly to support said extensions.

5. In forms for concrete structures, sectional liners, the sections thereof being secured together to form a unit, two of said sections being spaced apart to receive tie rods, one of said sections being continuously grooved along its front edge in register with the space between said sections, and a strip filling said groove between said tie rods.

AXEL G. W. WEDBERG. 

